Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Cash flows from operating activities:
Net loss	$ (2,290,000)	$ (672,000)	$ (1,040,000)	$ (1,136,000)	$ (3,567,000)	$ (3,159,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Bad debt recovery					(18,000)	0
Non-cash lease expense from right-of-use asset					0	17,000
Stock-based compensation					84,000	62,000
Non-cash revenue from digital assets					(99,000)	0
Unrealized loss on digital assets	1,517,000		0		1,486,000	0
Changes in operating assets and liabilities:
Accounts receivable					192,000	391,000
Inventory					0	189,000
Prepaid expenses and other current assets					(158,000)	(40,000)
Other assets					2,000	4,000
Accounts payable					57,000	(118,000)
Accrued expenses and other current liabilities					(238,000)	254,000
Deferred revenue					(12,000)	(104,000)
Lease liabilities					0	(17,000)
Net cash used in operating activities					(2,271,000)	(2,521,000)
Cash flows from investing activities:
Purchases of digital assets					(8,000,000)	0
Net cash used in investing activities					(8,000,000)	0
Cash flows from financing activities:
Proceeds from private placement, net of issuance costs					6,888,000	0
Net cash provided by financing activities					9,043,000	2,150,000
Decrease in cash					(1,228,000)	(371,000)
Cash and cash equivalents at beginning of period		$ 4,965,000		$ 5,990,000	4,965,000	5,990,000	$ 5,990,000
Cash and cash equivalents at end of period	3,737,000		5,619,000		3,737,000	5,619,000	4,965,000
Reconciliation of cash and cash equivalents
Cash	3,237,000		5,119,000		3,237,000	5,119,000
Current certificates of deposit	500,000		500,000		500,000	500,000	500,000
Total cash and cash equivalents	3,737,000		5,619,000		3,737,000	5,619,000	4,965,000
Cash paid during the period for interest					1,000	0
Non-cash investing and financing activities:
Common warrant issuance					335,000	0
Series F Preferred Stock conversion					39,000	194,000
Dividends, Preferred Stock					29,000	76,000
Warrants, deemed dividend	0		$ 8,974,000		0	8,974,000	$ 8,974,000
Common Stock Warrants [Member]
Cash flows from financing activities:
Proceeds from exercise of common stock warrants, net of costs					1,639,000	672,000
Preferred Warrants [Member]
Cash flows from financing activities:
Proceeds from exercise of common stock warrants, net of costs	$ 516,000				$ 516,000	$ 1,478,000